Hybrid Nanocomposite Prepared by Graft Copolymerization of 4-Acryloyl morpholine onto Chitosan in the Presence of Organophilic Montmorillonite

Al-Sigeny, Samia; Taleb, Manal F. Abou; El-Kelesh, Nabil A.

doi:10.1080/10601320802515449

Cited by 8 publications

(4 citation statements)

References 30 publications

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“…OMMT was prepared by cationic exchange between Na+‐MMT galleries and VBTAC according to the method previously reported . The suspension of Na+‐MMT in distilled water was stirred overnight.…”

Section: Methodsmentioning

confidence: 99%

Radiation synthesis and characterization of styrene/acrylic acid/organophilic montmorillonite hybrid nanocomposite for sorption of dyes from aqueous solutions

2014

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Organophilic montmorillonite (OMMT) was synthesized by cationic exchange reaction of Na+‐MMT and vinyl benzyl triethyl ammonium chloride (VBTAC) as a reactive organic modifier in an aqueous solution. A series of styrene (St)/acrylic acid (AA)/OMMT nanocomposite hydrogel containing different wt% of OMMT was synthesized through in situ polymerization using γ‐ray. The samples were characterized using Fourier transform infrared (FTIR), X‐ray powder diffraction (XRD), and transmission electron microscope (TEM), whereas thermal stability was examined by thermogravimetric analysis (TGA). The adsorption capacity and rate for both Acid Green B (anionic) and Maxilon C.I. Basic (cationic) dye including adsorption kinetics and isotherm were investigated at 30°C. TEM measurements showed spherical nanosized particles of average diameter 30–40 nm and XRD suggested the formation of exfoliated nanocomposite. TGA measurements showed that the addition of OMMT did not enhance the thermal stability where the onset temperature of the degradation for all samples was around 125°C. The effect of some important parameters on dye adsorption such as solution pH, initial dye concentration, and contact time was investigated. The equilibrium data obtained in batch experiments were correlated to Langmuir and Freundlich isotherm equations. Results showed that the adsorption of Acid Green B fitted well to the Langmuir model while the adsorption pattern of Maxilon C.I. Basic followed the Freundlich isotherm, which suggests heterogeneity of the adsorption sites on the nanocomposite. POLYM. COMPOS., 35:2353–2364, 2014. © 2014 Society of Plastics Engineers

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Section: Methodsmentioning

confidence: 99%

Radiation synthesis and characterization of styrene/acrylic acid/organophilic montmorillonite hybrid nanocomposite for sorption of dyes from aqueous solutions

2014

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“…The appreciable weight loss in the range from 300 to 450 °C is attributed to the decomposition of the ferrocene rings from the AEFC moieties and polymer backbones, indicating the improved thermal stability of the copolymers. A possible reason is that amorphous ACMO and PACMO- b -PAEFC block copolymer exhibit good flexibility, which prevents the spread of heat quickly and limits any further decomposition of the copolymers …”

Section: Results and Discussionmentioning

confidence: 99%

“…A possible reason is that amorphous ACMO and PACMO-b-PAEFC block copolymer exhibit good flexibility, which prevents the spread of heat quickly and limits any further decomposition of the copolymers. 45 3.2. Reversible Redox Self-Assembly of the Copolymers in Aqueous Solution.…”

Section: Characterization and Measurementsmentioning

confidence: 99%

Redox-Responsive Self-Assembly Micelles from Poly(N-acryloylmorpholine-block-2-acryloyloxyethyl ferrocenecarboxylate) Amphiphilic Block Copolymers as Drug Release Carriers

Luo

et al. 2017

ACS Appl. Mater. Interfaces

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Novel well-defined redox-responsive ferrocene-containing amphiphilic block copolymers (PACMO-b-PAEFC) were synthesized by ATRP, with poly(N-acryloylmorpholine) (PACMO) as hydrophilic blocks and poly(2-acryloyloxyethyl ferrocenecarboxylate) (PAEFC) as hydrophobic blocks. The copolymers were characterized by FT-IR and H NMR spectroscopies and gel permeation chromatography, and the crystalline behavior was determined by X-ray diffraction and small-angle X-ray scattering. The results showed that the size of the lamellar crystals and crystallinity vary with the systematic compositions while the periodic structure of the lamellar stacks has no obvious change. These block copolymers could self-assemble and form globular nanoscaled core-shell micellar aggregates in aqueous solution. The reductive ferrocene groups could be changed into hydrophilic ferrocenium via mild oxidation, whereas the polymer micelles at the oxidation state could reversibly recover from their original states upon reduction by vitamin C. The tunable redox response was investigated and verified by transmission electron microscopy, ultraviolet-visible spectroscopy, cyclic voltammetry, and dynamic light scattering measurements. The copolymer micelles were used to entrap anticancer drug paclitaxel (PTX), with high drug encapsulation efficiency of 61.4%, while the PTX-loaded drug formulation exhibited oxidation-controlled drug release, and the release rate could be mediated by the kinds and concentrations of oxidants. MTT assay was performed to disclose the biocompatibility and security of the copolymer micelles and to assess anticancer efficiency of the PTX-loaded nanomicelles. The developed copolymer nanomicelles with reversible redox response are anticipated to have potential in targeted drug delivery systems for cancer therapy.

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“…The idea was based on the arrangement of Cs polymer as a bilayer when the amount of the intercalated Cs was formed via the cationic site of Cs with the sodium site (Na) of MMT through cationic exchange and formation of hydrogen bonding [178,179]. Due to the mentioned interactions, the produced nanocomposite exhibited good functional and mechanical properties [180][181][182]. The electro-kinetic parameter (via zeta potential analysis) and rheological properties (via viscosity measurement) of the Cs composites increased as MMT dispersion increased [183].…”

Section: Cs/clay Biocompositesmentioning

confidence: 98%

Preparation, Properties and Applications of Chitosan-Based Biocomposites/Blend Materials: A Review

Julkapli

Akil

Ahmad

2011

Composite Interfaces

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Hybrid Nanocomposite Prepared by Graft Copolymerization of 4-Acryloyl morpholine onto Chitosan in the Presence of Organophilic Montmorillonite

Cited by 8 publications

References 30 publications

Radiation synthesis and characterization of styrene/acrylic acid/organophilic montmorillonite hybrid nanocomposite for sorption of dyes from aqueous solutions

Radiation synthesis and characterization of styrene/acrylic acid/organophilic montmorillonite hybrid nanocomposite for sorption of dyes from aqueous solutions

Redox-Responsive Self-Assembly Micelles from Poly(N-acryloylmorpholine-block-2-acryloyloxyethyl ferrocenecarboxylate) Amphiphilic Block Copolymers as Drug Release Carriers

Preparation, Properties and Applications of Chitosan-Based Biocomposites/Blend Materials: A Review

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